Pros
If you are looking for a place to throw your legs up and scrape by with a minimally competitive engineering wage, then this is the place. Keep your head down, and you'll maintain a steady paycheck. If you are familiar with corporate jargon, this company will reward you for it. And due to the complacency, any employee can genuinely find ways to prioritize their work life balance.
Kontras
As an old company on a old field, there is little innovation or growth. ADP is, self-admittedly, not a technology company - they specialize in sales. The company's growth is a long history of acquiring innovative HCM technologies, and riding that wave until the next acquisition. There is no real incentive to grow or change. There are leaders here who are tenured yes-men, Terms like "delegating" and "learning opportunities" are used to shirk work and hide extreme incompetence, which becomes evident when these leaders are not able to take genuine ownership.